Plant and Soil

, Volume 103, Issue 2, pp 155–168 | Cite as

Water stress effects on leaf elongation, leaf water potential, transpiration, and nutrient uptake of rice, maize, and soybean

  • V. C. Tanguilig
  • E. B. Yambao
  • J. C. O’toole
  • S. K. De Datta


A pot experiment was conducted in the greenhouse to determine and compare the responses of rice (Oryza sativa L. var, IR 36), maize (Zea mays L. var. DMR-2), and soybean (Glycine max [L.] Merr. var. Clark 63) to soil water stress. Leaf elongation, dawn leaf water potential, transpiration rate, and nutrient uptake in stressed rice declined earlier than in maize and soybean. Maize and soybean, compared with rice, maintained high dawn leaf water potential for a longer period of water stress before leaf water potential. Nutrient uptake under water stress conditions was influenced more by the capacity of the roots to absorb nutrients than by transpiration. Transport of nutrients to the shoots may occur even at reduced transpiration rate It is concluded that the ability of maize and soybean to grow better than rice under water stress conditions may be due to their ability to maintain turgor as a result of the slow decline in leaf water potential brought about by low, transpiration rate and continued uptake of nutrient, especially K, which must have allowed osmotic adjustment to occur.

Key words

leaf elongation rate leaf water potential maize nitrogen nutrient uptake phosphorus potassium rice soybean transpiration rate water stress 


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Copyright information

© Martinus Nijhoff Publishers 1987

Authors and Affiliations

  • V. C. Tanguilig
    • 1
  • E. B. Yambao
    • 1
  • J. C. O’toole
    • 1
  • S. K. De Datta
    • 1
  1. 1.Agronomy DepartmentThe International Rice Research InstituteLos BañosPhilippines

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